Rotary pump.



P. J GUBTIS. ROTARY PUMP.

APPLICATION FILED NOV. 12, 1908.

Patented 'July 5, 1910.

a SHEETS-SHEET 1.

AME

WH'NESSES F. J. CURTIS.

ROTARY PUMP.

APPLIGATION I'ILED NOV. 12, 1908.

963,690. Patented July 5, 1910.

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To all whom it concern: Be it. known that I, FRANK J. Courts, residing at Ben Avon, in the county of Allegheny and State of Pennsylvania, a citizen of the United States, have invented or discovered certain new and useful Improvements in Rotary Pumps, of which improvements the following is a specification.

The invention described herein relates to certain improvements in rotary pumps, and

has for its object a construction in which the blades or vanes are held w1th lncreased pressure -1n operatlve posltlon, dur ng such times as the water pocket in front of the vane is subjected to discharge pressure, and at other times the outward movement is due practically entirely to centrifugal force.

It is a further object of the invention to provide for the practically entire discharge through the outlet opening of all the water contained in the successive pockets as formed.

It is a furtherobject of the invention to provide for thecushioning of the blades or vanes While subjected tothe higherpressure.

The invention is hereinafter more fully described and claimed. I

In the accompanying drawings forming a part of this, specification, Figure 1 is a vlew partly in section and partly 1n side elevation of my improved pump; Fig. 2 is a trans verse section of the same; Flgs. 3 and 4 are The llning is provided alon space between the end and side elevations respectively of the lining or cylinder proper; Figs. 5 and 6 are end and side elevations of one of the blades or vanes. 1 In the practice of my invention the pum' consists of drum' 1 provided on its side wit inlet and discharge nozzles 2,and 3 and having removable heads 4 closing the ends of the drum and provided with bearings 5 for the shaft of the rotary member, said bearings being eccentric to the drum.-, Within this drum is placed a lining 6 forming the cylinder of the pump.v This lining is arrangedeccentrically to the drum thus pro-- vidmg a space between the lining and drum.

t e edges eccentric to the drum with anges 7 which will bear against the inner wall of the drum and hold the linin firmly in place. The firum and lining which extends from the inlet tothe outlet of the pump is divided into two compartments byan abutment 8 on the lining and the portion or compartment 9 of such space connecting I Specificationot letters'l'atentl "PatentedJflly Application filed nvemb=r 12,i9oa seriallio. 462,304.

I with the discharge port of the pump um;

ized' as an auxiliary discharge passage a connected with' the interior of cylinder by ports 10.

made of a w? t considerably the least wid h of the orts the selves but of a length less than t e cylinder so as to provide shoulders which w1ll prevent such outward movement of the blades or vanes as;will cause itto catch in the ports. On

the lining or v "I The inner endsof the discharge and inlet ports of rotary. umps have heretofore been;

reater than account of the length of travel :of the blades along these shoulders, the ends of the blades are worn away quite rapidly and the blades become inoperative. i r.

.In my improved pump the discharge and inlet ports 11 and 12 through the lining are made narrow in the direction-of movement of the bladesor vanes and of a length a little less than the length of the cylinder, so as to provide holding shoulders 13 for the vanes or blades. In order to compensate for such reduction in the discharge port, the auxiliary ports 10 are provided so that the total discharge through the main port 11 and through the auxiliary ports 10 and passage 9, will be equal to the capacity of the space or opening between adjacent vanes.

The rotary member 14 is provided with radial sockets 15 for the reception of the blades or vanes, which consist preferably ofouter portions 16 formed of a hard wood and inner portions or shoes 17 formed of metal, which when the pumps are employed in mines should be of a character capable of resisting the action of acid contained in such form an eificient'lubricant, and the acid in t the waterwill not have an injurious effect. If the blades or vanes were formed wholly of wood they would be too light to respond quickly'and efiiciently. to centrifugal action and the action of. ravityto move out radially when the bla es are moving down past the inlet port. Such retarded action will be prevented by the weight of the metal shoes which are so located as to be subject to a minimum wear. uWh'en passing acrossthe 'outlet port the blades 'or vanes are-subjected to a pressure tending to force them inwardly. Such inward movement is prevented by forming ports or passages '18'extending from points on the periphery of the rotary member in front of the blades or vanes to the inner of the main discharge port 11,- the blades or vanes will be held at the outer limits of their movements and in operatlve positions.

Small ports 19 are formed through the blades so as to provide jets of water under the pressure of the discharge head, and impinging on the wall of the cylinder and forming-water cushions between the ends of the blades or vanes and the cylinder. These cushions materially reduce the internal resistance of the pump.

Catch basins 20 are formed in the peripln cry of the rotary member in frontof the blades or vanes for the reception of sand, etc. which will be washed back into these basins and will not be carried in between the walls of the rotary member and the cylinder. As the blades or vanes move from the main outlet port, they are gradually forced in- I wardly and the water behind the blades is forced out through ,the passages 18, thus washing out the sand, etc. in the basins into the contracting pockets formed by the lining, the periphery of the rotary member and the blades. As the auxiliary orts are so arranged that the last port is ad acent to the point where the water pocket disappears it follows that practically all water moved forward by the blades is forced into the discharge and none will flow back into the next 7 pocket.

I claim herein as my invention:

1. In a rotary pump the combination of a rotary member provided with radially movable blades, each blade being movablein and out independent of the others, means for applying an' increased outwardly. acting pressure independently to each blade while the pocket in front of the blade is subjected to discharge pressure, a cylinder inclosing such member and provided with a main discharge port and havin an auxiliary discharge port in the rear 0 the main discharge P 2. In a rotary pump the combination of ,a rotary member provided with radially movable blades, each blade being movable in and out independent of the others, means for applying an increased outwardly acting pressure independently to each blade while the pocket in front-of said blade is subjected to discharge pressure, a cylinder inclosing such member and provided with a main discharge port restricted in the direction of rotation of such member and having auxiliary discharge ports in the rear of the main discharge port. i

3. In a rotary pump the combination of forming the rear wall of the 'eeaeeo r1phery of the rotary member in front of the. sockets to the inner ends of the latter,

blades or 'vanes mounted in said sockets, the cylinder being provided with an auxiliary outlet arranged to permit of the esca e of water from the sockets after the blades 01ming the rear walls thereof have passed beyond the main outlet'port.

4; In a rotary pump the combination of a single cylinderhaving inlet and outlet ports,

a rotary member eccentrically mounted in said cylinder, radially movable blades or vanes carried by the cylinder, whereby radially contracted water pockets are formed in front'of the blades or vanes, each blade being movable in and out independently of the other blades, means for applying an increased outwardly acting ently to'each blade while the ocket in front of such blade is subject to dist iarge pressure and means permitting a "reduction of such outwardly acting pressure after the blade pocket has passed the discharge outlet.

5. In a rotary pum the combination of a cylinder provided wit 1 inlet and outlet port-s,

a rotary member eccentrically mounted in the cylinder and provided with radial sockets and having assagesextending from, points in front ot the sockets to the inner ends of the latter, blades or vanes movably mounted in said sockets and having ,openings therethrough.

6. In a rotary pump the combination of a cylinder provided with inlet and outlet ports, a rotary member eccentrically mounted in the c linder and having non-communicating radial sockets and provided with catch basins in front of the sockets and with passages extending from the sockets to the catch basins, and blades or vanes radially mounted in said sockets. 7. In a rotary ump the combination of a cylinder provide with inlet and outlet openings and having auxiliary outlets in the rear of the main outlet, a rotary member having radial non-communicating sockets and eccentricallymounted in the cylinder and having catch basins in advance, of the radial sockets and provided withpassages extending from the basins to the inner ends of the sockets and blades or vanes arranged in said sockets and each blade or vane bein movable in and out independent of the others.

In testimony whereof, I have hereunto set my hand.

- F. J. CURTIS. Witnesses:

CHARLES BARNETT, FRANCIS J. ToMAssoN.

pressure mdependl 

